Apparatus for making pulp or the like



Aug. 14, 192s. A 1,680,912

H. D. MARTINDALE f APPARATUS FOR MAKING PULP OR THE LIKE Filed Feb. 17,1927 2 Sheets-SheetI NVENTOR. 'i' a" Filed Feb. 17, 1927 2 sheets-sheet2 INVENTOR.

H. D. `MARTINDALE APPARATUS FOR MAKING PULP OR THE'LKE Aug. 14, 1928.

Patented Aug. 14, 1928.

UNITED vSTATES lLeinen lPATENT OFFICE.

HOHER D. MARTINDALE, 0F MIDDIETOWN, OHIO.

i APPARATUS FOR MAKING PULP 0R THE LIKE.'

Application led February 17, 1927. Serial No. 188,912.

'the improvements com rised in the invention have been applie theimprovements being shown 1n section;

Fig.v 2 1s asectional view in elevation of the complete apparatus, takenon line 2--2 of Fig. 1; f

Fig. 3 is a sectional view 1n elevation taken on line 3 3 of Fig. 1;

Fig. 4 is a sectional view corresponding to Fi 3, showing amodification;

Fig. 5 is a view in perspective of a perforated backfall used inconnection with the apparatus;

`ig. 6 is a deta1l view of the drain for conducting water and salvagedstock back into the beater.

The objects attained in the inventlon consist in a simple apparatus usedin connec- `tion with an ordinary stock beater or breaker, preferablyequipped with a perforated backfall, for removing foreign materials, orjunk, from the stock 1n process of reduction to prevent accumulation ofsuch material in the beater tub and the resulting interference with theprocesses of reduction.

Thus with the improved apparatus as herein set forth, less and cheapermachinery is required for making pulp, and reduction is speeded up andincreased output 1s obtained.

As here shown, the improved apparatus comprises a stock beater 1 of theusual construction, including as shown in Figs. 1 and 3, a mid-feather2, a beater roll 3, perforated backfall 4, and extraction chest 5 forfinished pulp, the beater as a whole being below the floor line 6.

The means for removing the junk from the beater consist of a channel 7formed in the bottom of the beater tub on the receiving side of thebeater roll and extended through the. mid-feather, across the bottom tothe opposite Wall of the tub, and upwardly outside the wall to the Hoorlevel,` as best shown iin-Fig. 3.

Heavy foreign substances-sera s of iron, gravel, sand, etc.,-settle inthe ottom of the channel 7, the movement of the stock in the beaterbeing constantly over the channel, all such material settles by gravityto the lowest level in the tub.

A series of buckets 8, on an endless chain 9, directed over wheels 10,supported on an overhead structure 11, traverse the channel 7 and act toscoop out the junk and deliver it in a container l2, which is here shownas supported on wheels 13, `on a track 14, for

convenience in dumping the container for removing the junk therefrom.

A water line 15 and drain line 16 are connected to the junk containerfor flushing it to recover salvageable pulp carried up with the junk,a'nd returning it to the beater, the v drain pipe discharging intochannel 7, or direct into the beater, as may be desired.

To further facilitate reclaiming salvageable material from the junk, thewalls of the container 12, as here shown, are perforated, the -dischargethrough the walls being upon a deck 17 disposed over the beater tub andhaving a drain 18 into channel 7.

The perforated backfall, as best shown in Fig. 2 in its relation to thebeater roll, acts to separate fine pulp from the mass of pulp in processof reduction in the beater, the line pulp passing through the gradingaper-` tures in the backfall into the chest 5, being removed from thechest through a pipe 19.

The modified construction lllustrated in Fig. 4 consists in extendingthe channel 7* from one side of the beater to the other, and structuralmodifications for operating the buckets for removing the junk asindicated in the drawing. In the modified form the junk removingmechanism is applicable to stock beaters or breakers in which no hollowmid-feather is used.

From the foregoing description and the drawings it will be seen that thereduction of pulp will be continuous without the frequent interruptionincident to shutting down the reduction apparatus for removing the junkfrom the beater as in the usual practice.

Having described my invention, I claim: 1. A pulp reduction apparatusVincluding 1n combination, a stock beater, a channel eX- tended acrossthe bottom to an adjacent wall of the beater tub and upwardly outfsidethe wall, and acting to receive foreign materials separated by gravityfrom stock 1n process of reduction in the beater, and a series ofdevices, as buckets, operably con- 2. A pulp reduction apparatusincluding in combination, a stock beater, a channel ex-l tended thrughthe mid-feather, across the bottom to the adjacent wall of the beatertub and upwardly outside the wall, and acting to receive foreignmaterials se arated by gravity from stock in process o reductioniin thebeater, and a series of devices, as buckets, operably connected fortraversing the channel for removing the accumulation of said materialtherein.

3. A pulp reduction apparatus including in combination, a stock beater,a channel extended across the bottom to an adjacent wall of the beatertub and upwardly outside the wall, and acting to receive foreignmaterials separated by gravity from stock in rocess of reduction in thebeater, a series of evices, as buckets, operably connected fortraversing the eliannel`for removing the accumulation of said materialtherein, a track and Wheeled container o erable on the track forreceiving the materia from said devices.

4. A pulp reduction apparatus including in combination, a stock beater,a channel extended across the bottom to an adjacent wall of the beatertub and upwardly outside the wall, and acting to receive foreignmaterials separated by gravity from stock in process of reduction in thebeater, a series of devices, as buckets, operably connected fortraversing "the channel for removing the accumulation of said materialtherein, a container havin apertured walls :for receiving the materiafrom said devices, a water line connection for flushing the container,and a drain connection for returning water and salvaged stock dischargedthrougli'said walls to the beater.

5,. A ulp reduction apparatus including in combination, a stock beater,a channel extended across the bottom to an adjacent wall of the beatertub and upwardly outside the wall, and acting toreceive foreignmaterials separated by gravity from stock in process of reduction in thebeater, a series of devices, as buckets, opeiably connected foi'traversing the channel for removing the accumulation of said materialtherein, a container for receiving the material removed from the beaterby said devices, means for flushing the container for removing salvagedstock therefrom and a deck over the beater acting to drain the water andstock discharged from the container back into the beater tub.

.6. A ulp reduction apparatus including in combination, a stock beater,a channel extended across the bottom to an adjacent wall of the beatertub and upwardly outside the wall, and acting to receive foreignmaterials separated by gravity from stock in process of reduction in thebeater, a series of devices, as buckets, operably connected fortraversing the channel for removing the accumulation of said materialtherein, a container for receiving the material removed from the beaterby said devices, means for flushing the container for removing salvagestock therefrom and a deck including a drain leading to said channelacting to return water and stock discharged from said rece tacle to thebeater tub.

n'testimony whereof, I aix my signature.

HOMlER D. MARTINDALE.

